Hello! Everyone:) I was just wondering if you can help me with my test.
Points: 99
Answers
Answer:
By their properties ;)
Explanation:
[tex]\Large \boxed{\sf by \ their \ properties}[/tex]
Every element has a set of particular characteristics. Each has a unique atomic and mass number because they contain a different ratio of protons and neutrons. The number of protons in an element mirrors the element's atomic number. The mass number equals the sum of the element's protons and neutrons.
According to increasing atomic numbers, chemical elements get organized. Periods and groups are the names of the horizontal rows and vertical columns, respectively. The chemical characteristics of elements within the same group are comparable due to their similar valency and number of outer electrons.
Related Questions
Atoms with the same number of protons but with different electrical charges are called:
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Answer:
It is called ions
Explanation:
HELP WAAAAAAAAAAAAAAA
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Answer:
5. 0.02 seconds
6. (a) 0.0167 seconds
(b) Period in Lebanon is 0.02 seconds and in the U.S 0.0167 seconds. That means that the U.S. has the faster period.
Explanation:
A little help here please
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Answer:
Prokaryotic Cells:
- Bacteria
- Unicellular Organisms
- DNA as genetic material
- Ribosomes
- Do not have membrane bound organelles
- Always contain cell wall
Eukaryotic Cells:
- Contains organelles
- Have membrane bound organelles
- Unicellular Organism
- DNA as genetic material
- Ribosomes
- Have loose strand of DNA
- Has nucleus
- Multicellular Organism
- Plant cell
- Animal cell
Explanation:
I have separated them and made the common characteristics in bold. I cannot guarantee that it is correct, these are my educated estimates.
Use the pictures below to answer these questions: How does Magnesium become an ion? What is the charge of the Magnesium ion?
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Answer:
Explanation:
The bottom picture shows a Mg atom. There are two electrons on the outside ring. When Mg reacts with something, these 2 electrons are given away. The top picture records that fact.
Which element has a greater Ist ionization energy, Phosphorus or Fluorine?
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Answer:
phosphorus
Explanation:
Write the chemical formulas and names for the following ionic compounds. Cobalt (III) and bromine
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Answer:
CoBr2,CoBr2·6H2O,CoBr2·2H2O
Explanation:
Nivel de energia maximo de 20Ca
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2. Use the graph below to answer the following questions.
Does this graph represent an endothermic or an exothermic reaction?
How do you know this graph represents that type of reaction?
What is the potential energy of the reactants (PEreactants)?
What is the potential energy of the products (PEproducts)?
What is ΔH of the reaction?
REMEMBER: ΔH = PEproducts - PEreactants
What is the activation energy (Ea) of this reaction?
REMEMBER: Activation Energy = Maximum Energy - PEreactants
Answers
Answer:
The graph represents an endothermic reaction.
The products have more energy than the reactants.
80kJ
160kJ
80kJ
160kJ
The given graph is representing an endothermic reaction as the potential energy reactants are lower than that of the products.
ΔH of the reaction and activation energy is 80 KJ and 160 KJ respectively.
What is the endothermic process?An endothermic process can be defined as a process with an increase in the enthalpy H of the system. An endothermic process involves an increase in the temperature of the system.
Whether a process occurs spontaneously depends not just on the enthalpy change but also on the entropy change and temperature.
From the graph, the potential energy of the reactants = 80 KJ
The potential energy of the products = 160 KJ
ΔH of the reaction, ΔH = PE(products) - PE(reactants)
ΔH = 160 -80 = 80 KJ
The activation energy (Ea) of this reaction will be:
Activation Energy (Ea) = Maximum Energy - PE(reactants)
Activation Energy = 240 - 80 = 160 KJ
Learn more about the endothermic process, here:
brainly.com/question/13818956
#SPJ2
When sodium is put in water, the metal floats on the surface and reacts to form sodium
pls help asap
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Answer: Sodium also floats on the surface, but enough heat is given off to melt the sodium (sodium has a lower melting point than lithium and the reaction produces heat faster) and it melts almost at once to form a small silvery ball that dashes around the surface.
Explanation:
Answer:
hydroxide.
Explanation:
Alkali metals are in group 1 of the Periodic Table. They are on the left of the Periodic Table. These are the alkali metals as follows:
LithiumSodiumPotassiumRubidiumCaesiumFranciumWhen alkali metals react with water they make alkaline solutions, so the universal indicator turns people and they produce hydrogen and a metal hydroxide. When sodium is put in water, the metal floats on the surface it reacts to form sodium hydroxide and hydrogen.
002 (part 1 of 2) 10.0 points
1.5 mol HCl and 3.7 mol NaOH react accord-
ing to the equation
HCl + NaOH → NaCl + H2O.
If the limiting reactant is HCl, calculate the
amount of NaCl formed.
1. 1.9
2. 2
3. 1.1
4. 1.5
5. 1
6. 1.8
7. 1.2
8. 1.3
9. 1.4
10. 1.7
Answer in units of mol.
mol,
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Answer:
4) 1.5 mol
Explanation:
Well, the equation is already balanced and the mole to mole ratio of reactants and products are all 1. So if the limiting reactant is HCl and you have 1.5 mol, you do the mole to mole ratio with NaCl and since it is 1 to 1, there'd be 1.5 mol of NaCl.
how do the densities of crystalline and amorphous polymers of the same material that have identical molecular weights compare?
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Find the actual yield when the theatrical yield is 1.09g and percent yield is 90%.
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Therefore actual yield= 90/100 * 1.09g = 0.98g
Actual yield: 0.98 g
FeCl3
+
NaOH →
Fe(OH)
+
Naci
-
balance plzzzz help I live give u the brainliest
Answers
Zn-71 has a half life of 2.4 minutes. If one had 100g at the beginning, how many grams would be left after 12 minutes?
Answers
3.125g
Explanation
2.4 minutes = 1 half life
so 12 minutes = 5 half lives (12/2.4)
100g/2 = 50g (1 half life)
50g/2 = 25g (2 half lives)
25g/2 = 12.5g (3 half lives)
12.5g/2 = 6.25g (4 half lives)
6.25g/2 = 3.125g (5 half lives)
Rain is-pouring down on you. Your friend asks where so much water
came from. You explain that the water could once have been
a) in a lake.
c) in an ocean.
-b) in-a river.
d) any of the above.
Answers
Answer:
D
Explanation:
It could come from anybody of water around you that had some water evaporated.
If two atoms have an electronegativity difference of 1.3, what type of bond would form between them?
Select one:a. non polar covalent b. polar covalent. c. ionic
Answers
Answer:
I would say iconic bond
Explanation:
b. polar covalent
Explanation:
any electronegativity difference between .6 and 1.7 is polar covalent and anything greater than 1.7 is ionic, since this is less that 1.7 and greater than .6 the bond is polar covalent
Hope this helps!
NO LINKS!!!
Static electricity is a ____ charge.
A. permanent
B. missing
C. flowing
D. temporary
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Static electricity is a missing charge. When positive ions are formed (where an electron is missing), this imbalance is called static electricity.
Pls help I will give u points pls
Answers
Answer:
i think D
Explanation:
Elements are usually dull, brittle and do not conduct electricity are know as_____.
Points: 46
Answers
Answer:
nonmetals. it's one of them
Is oxygen ionic or molecular
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Answer:
morlecular element is oxygen
Molecular is oxygen
Name one nutrient indicator and explain how it works.
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Answer:
Hi this is Adhira please make me as brainlist
Explanation:
The nutritional status indicators for the CDC Growth Charts include obesity, overweight, underweight, and short stature. Percentiles are used to rank an individual or a group on a growth chart and indicate where either fits in the context of the reference population
what are the relationships among bond order, bond length, and bond energy?
Answers
Explanation:
When a bond is strong, there is a higher bond energy because it takes more energy to break a strong bond. This correlates with bond order and bond length. When the bond order is higher, bond length is shorter, and the shorter the bond length the greater the bond energy.
Explain what happens during soil depletion and also how we can help prevent this naturally without chemicals?
PLZ FAST TYY <3
Answers
Answer: create more healthy products for the soil and animals
Explanation:
Alison observes that when she injects additional gas molecules into a container of gas, the number of collisions in the container (and the pressure inside) increases. She then increases the volume of the container just enough to restore it to its original pressure. Which of the following laws best describes what Alison observed?
A. Amonton's Law
B. Avogadro's Law
C. Boyles Law
D. Charles's Law
E. Dalton's Law
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Answer:
Explanait it is not d
A sample of gas occupies 20 mL at -109 degree C. What volume does the sample
occupy at 65 °C?
Answers
Answer: V2= 41.2mL
Explanation:
Givens:
* V1= 20ml
* T1 = -109 ⁰C --> K= ⁰C + 273.15 --> 164.15 K
* V2 = ??
* T2= 338.15 K
Use Charles law V1/T1 = V2/T2
Since we are looking for V2 we can rearrange the formula to
V2= (T2 x V1) /T1
V2= (338.15K x 20mL) / 164.15 K
V2= 41.2mL
NOTE:
Temperature should always be in K not in ⁰C or ⁰F
To convert from C to K use
*K= ⁰C + 273.15
Enter your C value in the ( ⁰C ) and you can get K
(BRAINLIEST QUESTION)
Which answer below best describes what the law of Natural Selection is?
Select one:
a.
Natural selection is the process where those members of a species that can survive environmental hardships reproduce the future offspring with their strong characteristics being passed on, thus evolving the entire species.
b.
Natural selection is the process wherein species evolve over time because those members with common traits tend to survive hardships and produce more offspring.
c.
Natural Selection is the law that states the the natural evolution of a species is dependent on the shifts of the environment.
Answers
Answer:
I think it's A but I might be wrong
Explanation:
Help!! I’ll mark you Brainliest.!
Answers
Answer:
For 5 pts? gimme that
Explanation:
Answer:
Explanation:
if you know what those phrases mean, then you can look them up and draw those pictures you find, as well as add the definition of each.
Which statement about states of matter is correct? (1 point)
O If you add enough heat to a gas, it will change into a liquid
If you cool a solid enough, it will change into a liquid
If you add enough heat to a solid it will change into a liquid.
o If you cool a liquid enough, it will change into a gas
Answers
Answer:
C
Explanation:
If you add enough heat to a solid it eventually becomes a liquid
Choose the best answer.
What is the sum?
2/3+7/15
O 14/15
O1/2
O1 2/15
O3/5
Answers
Answer:
1 2/15
Explanation:
2/3 + 7/15 = 17/15 =1 2/15
application of electroplating
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Answer:
are you interested in tun